Boot-calk.



PATENTED AUG. 11, 1903. A. B. LIPSIGOMB. BOOT GALK.

APPLICATION FILED APR. 21 1902.

N0 MODEL.

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Patented August 11, 1903."

ATJENT Enron.

ABRAHAM B. LIPSOO MB, OF YAGER, CALIFORNIA.

BOOT-CALK.

SPECIFICATION forming part of Letters Patent No. 736,121, dated August 11, 1903.

Application filed April 21, 1902. Serial No. 104,010. (No model.)

To all whom it may concern.-

Be it known that I, ABRAHAM B. LIPSCOMB, a citizen of the United States, residing at Yager, in the county of Humboldt and State of California, have invented a new and useful Boot-Oalk, of which the following is a specification.

This invention relates to boot-calks in general, and particularly to that class employed by lumbermen and loggers.

The object of the invention is in a ready, simple, feasible, and thoroughly practical manner to prevent the calk from becoming disconnected from the heel or sole when once positioned thereon.

With these and other objectsin View, as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts of a boot-calk, as will be hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in. which like numerals of reference indicate corresponding parts, there are illustrated two forms of embodiment of the invention capable of carrying the same into practical operation, it being understood that the elements therein exhibited may be varied or changed as to shape, proportion, and exact manner of assemblage without departing from the spirit thereof, and in these drawings- Figure 1 is aviewin perspective of a boot, showing the improved calk applied to the heel and sole thereof. Fig. 2 is a view in sectional elevation, showing the manner in which the calk is applied to the boot, in this instance to the heel. Fig, 3 is a view in elevation, partlyin section, of one form of oalk. Fig. 4 is a similar view of a slightly-modified form thereof. Fig. 5 is also a view in side elevation, showing the parts of the calk exhibited in Fig. 4 separated.

Referring to the drawings, 1 designates generally the calk, comprising a threaded shank 2, a spike 3, and adished stop-disk 4., all of the parts being integral. The spike for a portion of its length adjacent to the stop- .disk issquare in cross-section, as shown at 5, the remaining portion of its length being circular or approximately circular in crosssection and tapered to a sharp point. The

square portion 5 is provided to furnish a any shape other than round to permit attachment thereto of a suitable device for positioning the calk.

The dished stop 4:, which constitutes one of the essential features of this invention, subserves in addition to a means of limiting the inward seating of the shank the further function of compressing the leather of the boot heel or sole around the shank, thereby in a positive manner checkingany tendency of the shank to Work loose, and bytighteniug the calk from time to time, if found necessary, it will always be held rigidly in position. The above result is accomplished by having the face of the disk that comes next to the heel or sole concaved and by having the threads of the shank extending down to the disk, so that when the shank is seated the V sharp edge 6 of the disk will sink into the leather and bunch and compress it around the shank. The under face 7 of the disk is convex, and thereby obviates the presentation of any obstruction that will be liable to become entangled with pndergrowth or the like where used by lumbermen.

Instead of making the stop disk and shank integral the same may be made in separate parts, as shown in Figs. 4 and 5, and still be made to perform the function designed. When this latter arrangement is employed, the disk will have an opening 8 to receive the shank, and the under side of the disk will be provided with a recess 9 to be engaged by a shoulder 10 on the shank, thereby to limit the inward insertion of the shank with relation to the disk. The disk being constructed in the same manner as that shown in Fig. 3

will perform the same function as to crowdvery serious defects in calks of this character heretofore employed. 4 I

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. As a new article of manufacture, a bootcalk comprising a threaded shank, a pointed spike terminating at its point of juncture with the shank in a shoulder, and a dished disk 15 having a recess to receive the shoulder.

In testimony that I claim the foregoing as my own I have hereto aflixed my signature in calk having a disk, and a threaded shank and i the presence of two Witnesses. pointed spike extending in alinement from opposite surfaces of the disk, the surface of the disk from which the shank extends being concaved.

2. As a new article of manufacture, a boot ABRAHAM B. LIPSCOMB.

Witnesses:

r JOHN MoOoRD,

ALBERT CHRISTENSEN. 

